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- W4247496417 abstract "In the past few years, vapour phase Beckmann rearrangement of cyclohexanone-oxime to caprolactam has been investigated in depth and a wide variety of catalysts has been studied. To date a large number of experiments concerning non-zeolitic supported boron oxides have been carried out. In the present work, we report on boria-alumina catalysts where the boron is part of the catalyst lattice, these catalysts being tested for the cyclohexanone-oxime vapour phase rearrangement to caprolactam. These catalysts are obtained by the sol–gel route using (NH4)2B4O7 as the source of boron, which has never been used before in B/Al sol–gel synthesis. The local environment of catalysts was characterised by solid state 27Al- and 11B-MAS-NMR and their structure by X-ray powder diffraction; the acidity was determined by TPD of ammonia. The effect of B/Al ratio and the role of different polar agents in the feed were also investigated by catalytic tests." @default.
- W4247496417 created "2022-05-12" @default.
- W4247496417 date "2003-10-01" @default.
- W4247496417 modified "2023-09-26" @default.
- W4247496417 title "CONTENTS CONTINUED" @default.
- W4247496417 doi "https://doi.org/10.1016/s0926-860x(03)00775-0" @default.
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